CVE-2026-88252 — Sssd: sssd: denial of service via responder connection retry loop during file descriptor exhaustion

Description (CNA)

A flaw was found in sssd. A local user can cause a Denial of Service (DoS) by exhausting the responder service's available file descriptors (system handles used for open connections). By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection attempts, an attacker can trigger an unthrottled retry loop. This condition leads to high CPU utilization and stalls the service, preventing legitimate identity and authentication requests from being processed.

Affected (CNA)

Vendor / product	Versions
Red Hat / Red Hat Enterprise Linux 10	affected
Red Hat / Red Hat Enterprise Linux 6	unknown
Red Hat / Red Hat Enterprise Linux 7	affected
Red Hat / Red Hat Enterprise Linux 8	affected
Red Hat / Red Hat Enterprise Linux 9	affected
Red Hat / Red Hat OpenShift Container Platform 4	affected
Red Hat / Red Hat OpenShift Container Platform 4	affected

CWE

CWE-835

References

ADP enrichment

CISA-ADP

No English description supplied.

https://bugzilla.redhat.com/show_bug.cgi?id=2479240